clk: qcom: add SAR2130P GPU Clock Controller support

Add support for the GPU Clock Controller as used on the SAR2130P and
SAR1130P platforms.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20241027-sar2130p-clocks-v5-11-ecad2a1432ba@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

3 files changed, 512 insertions, 0 deletions

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index 5d55df0e8b9b..75b9f645eae8 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -574,6 +574,15 @@ config SAR_GCC_2130P
 	  Say Y if you want to use peripheral devices such as UART, SPI,
 	  I2C, USB, SDCC, etc.
 
+config SAR_GPUCC_2130P
+	tristate "SAR2130P Graphics clock controller"
+	select QCOM_GDSC
+	select SAR_GCC_2130P
+	help
+	  Support for the graphics clock controller on SAR2130P devices.
+	  Say Y if you want to support graphics controller devices and
+	  functionality such as 3D graphics.
+
 config SC_GCC_7180
 	tristate "SC7180 Global Clock Controller"
 	select QCOM_GDSC
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index 992192ea231c..c581e65f173c 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -86,6 +86,7 @@ obj-$(CONFIG_SA_GCC_8775P) += gcc-sa8775p.o
 obj-$(CONFIG_SA_GPUCC_8775P) += gpucc-sa8775p.o
 obj-$(CONFIG_SA_VIDEOCC_8775P) += videocc-sa8775p.o
 obj-$(CONFIG_SAR_GCC_2130P) += gcc-sar2130p.o
+obj-$(CONFIG_SAR_GPUCC_2130P) += gpucc-sar2130p.o
 obj-$(CONFIG_SC_GCC_7180) += gcc-sc7180.o
 obj-$(CONFIG_SC_GCC_7280) += gcc-sc7280.o
 obj-$(CONFIG_SC_GCC_8180X) += gcc-sc8180x.o
diff --git a/drivers/clk/qcom/gpucc-sar2130p.c b/drivers/clk/qcom/gpucc-sar2130p.c
new file mode 100644
index 000000000000..dd72b2a48c42
--- /dev/null
+++ b/drivers/clk/qcom/gpucc-sar2130p.c
@@ -0,0 +1,502 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2021, Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2024, Linaro Limited
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,sar2130p-gpucc.h>
+#include <dt-bindings/reset/qcom,sar2130p-gpucc.h>
+
+#include "clk-alpha-pll.h"
+#include "clk-branch.h"
+#include "clk-rcg.h"
+#include "common.h"
+#include "gdsc.h"
+#include "reset.h"
+
+enum {
+	DT_BI_TCXO,
+	DT_GPLL0_OUT_MAIN,
+	DT_GPLL0_OUT_MAIN_DIV,
+};
+
+enum {
+	P_BI_TCXO,
+	P_GPLL0_OUT_MAIN,
+	P_GPLL0_OUT_MAIN_DIV,
+	P_GPU_CC_PLL0_OUT_MAIN,
+	P_GPU_CC_PLL1_OUT_MAIN,
+};
+
+static const struct pll_vco lucid_ole_vco[] = {
+	{ 249600000, 2000000000, 0 },
+};
+
+/* 470MHz Configuration */
+static const struct alpha_pll_config gpu_cc_pll0_config = {
+	.l = 0x18,
+	.alpha = 0x7aaa,
+	.config_ctl_val = 0x20485699,
+	.config_ctl_hi_val = 0x00182261,
+	.config_ctl_hi1_val = 0x82aa299c,
+	.test_ctl_val = 0x00000000,
+	.test_ctl_hi_val = 0x00000003,
+	.test_ctl_hi1_val = 0x00009000,
+	.test_ctl_hi2_val = 0x00000034,
+	.user_ctl_val = 0x00000000,
+	.user_ctl_hi_val = 0x00000005,
+};
+
+static struct clk_alpha_pll gpu_cc_pll0 = {
+	.offset = 0x0,
+	.vco_table = lucid_ole_vco,
+	.num_vco = ARRAY_SIZE(lucid_ole_vco),
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_LUCID_OLE],
+	.clkr = {
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_pll0",
+			.parent_data = &(const struct clk_parent_data) {
+				.index = DT_BI_TCXO,
+			},
+			.num_parents = 1,
+			.ops = &clk_alpha_pll_lucid_evo_ops,
+		},
+	},
+};
+
+/* 440MHz Configuration */
+static const struct alpha_pll_config gpu_cc_pll1_config = {
+	.l = 0x16,
+	.alpha = 0xeaaa,
+	.config_ctl_val = 0x20485699,
+	.config_ctl_hi_val = 0x00182261,
+	.config_ctl_hi1_val = 0x82aa299c,
+	.test_ctl_val = 0x00000000,
+	.test_ctl_hi_val = 0x00000003,
+	.test_ctl_hi1_val = 0x00009000,
+	.test_ctl_hi2_val = 0x00000034,
+	.user_ctl_val = 0x00000000,
+	.user_ctl_hi_val = 0x00000005,
+};
+
+static struct clk_alpha_pll gpu_cc_pll1 = {
+	.offset = 0x1000,
+	.vco_table = lucid_ole_vco,
+	.num_vco = ARRAY_SIZE(lucid_ole_vco),
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_LUCID_OLE],
+	.clkr = {
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_pll1",
+			.parent_data = &(const struct clk_parent_data) {
+				.index = DT_BI_TCXO,
+			},
+			.num_parents = 1,
+			.ops = &clk_alpha_pll_lucid_evo_ops,
+		},
+	},
+};
+
+static const struct parent_map gpu_cc_parent_map_0[] = {
+	{ P_BI_TCXO, 0 },
+	{ P_GPLL0_OUT_MAIN, 5 },
+	{ P_GPLL0_OUT_MAIN_DIV, 6 },
+};
+
+static const struct clk_parent_data gpu_cc_parent_data_0[] = {
+	{ .index = DT_BI_TCXO },
+	{ .index = DT_GPLL0_OUT_MAIN },
+	{ .index = DT_GPLL0_OUT_MAIN_DIV },
+};
+
+static const struct parent_map gpu_cc_parent_map_1[] = {
+	{ P_BI_TCXO, 0 },
+	{ P_GPU_CC_PLL0_OUT_MAIN, 1 },
+	{ P_GPU_CC_PLL1_OUT_MAIN, 3 },
+	{ P_GPLL0_OUT_MAIN, 5 },
+	{ P_GPLL0_OUT_MAIN_DIV, 6 },
+};
+
+static const struct clk_parent_data gpu_cc_parent_data_1[] = {
+	{ .index = DT_BI_TCXO },
+	{ .hw = &gpu_cc_pll0.clkr.hw },
+	{ .hw = &gpu_cc_pll1.clkr.hw },
+	{ .index = DT_GPLL0_OUT_MAIN },
+	{ .index = DT_GPLL0_OUT_MAIN_DIV },
+};
+
+static const struct parent_map gpu_cc_parent_map_2[] = {
+	{ P_BI_TCXO, 0 },
+	{ P_GPU_CC_PLL1_OUT_MAIN, 3 },
+	{ P_GPLL0_OUT_MAIN, 5 },
+	{ P_GPLL0_OUT_MAIN_DIV, 6 },
+};
+
+static const struct clk_parent_data gpu_cc_parent_data_2[] = {
+	{ .index = DT_BI_TCXO },
+	{ .hw = &gpu_cc_pll1.clkr.hw },
+	{ .index = DT_GPLL0_OUT_MAIN },
+	{ .index = DT_GPLL0_OUT_MAIN_DIV },
+};
+
+static const struct freq_tbl ftbl_gpu_cc_ff_clk_src[] = {
+	F(200000000, P_GPLL0_OUT_MAIN, 3, 0, 0),
+	{ }
+};
+
+static struct clk_rcg2 gpu_cc_ff_clk_src = {
+	.cmd_rcgr = 0x9474,
+	.mnd_width = 0,
+	.hid_width = 5,
+	.parent_map = gpu_cc_parent_map_0,
+	.freq_tbl = ftbl_gpu_cc_ff_clk_src,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "gpu_cc_ff_clk_src",
+		.parent_data = gpu_cc_parent_data_0,
+		.num_parents = ARRAY_SIZE(gpu_cc_parent_data_0),
+		.ops = &clk_rcg2_shared_ops,
+	},
+};
+
+static const struct freq_tbl ftbl_gpu_cc_gmu_clk_src[] = {
+	F(19200000, P_BI_TCXO, 1, 0, 0),
+	F(220000000, P_GPU_CC_PLL1_OUT_MAIN, 2, 0, 0),
+	F(550000000, P_GPU_CC_PLL1_OUT_MAIN, 2, 0, 0),
+	{ }
+};
+
+static struct clk_rcg2 gpu_cc_gmu_clk_src = {
+	.cmd_rcgr = 0x9318,
+	.mnd_width = 0,
+	.hid_width = 5,
+	.parent_map = gpu_cc_parent_map_1,
+	.freq_tbl = ftbl_gpu_cc_gmu_clk_src,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "gpu_cc_gmu_clk_src",
+		.parent_data = gpu_cc_parent_data_1,
+		.num_parents = ARRAY_SIZE(gpu_cc_parent_data_1),
+		.flags = CLK_SET_RATE_PARENT,
+		.ops = &clk_rcg2_shared_ops,
+	},
+};
+
+static struct clk_rcg2 gpu_cc_hub_clk_src = {
+	.cmd_rcgr = 0x93ec,
+	.mnd_width = 0,
+	.hid_width = 5,
+	.parent_map = gpu_cc_parent_map_2,
+	.freq_tbl = ftbl_gpu_cc_ff_clk_src,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "gpu_cc_hub_clk_src",
+		.parent_data = gpu_cc_parent_data_2,
+		.num_parents = ARRAY_SIZE(gpu_cc_parent_data_2),
+		.ops = &clk_rcg2_shared_ops,
+	},
+};
+
+static struct clk_branch gpu_cc_ahb_clk = {
+	.halt_reg = 0x911c,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x911c,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_ahb_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&gpu_cc_hub_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_crc_ahb_clk = {
+	.halt_reg = 0x9120,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x9120,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_crc_ahb_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&gpu_cc_hub_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_cx_ff_clk = {
+	.halt_reg = 0x914c,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x914c,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_cx_ff_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&gpu_cc_ff_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_cx_gmu_clk = {
+	.halt_reg = 0x913c,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x913c,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_cx_gmu_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&gpu_cc_gmu_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_aon_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_cxo_aon_clk = {
+	.halt_reg = 0x9004,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x9004,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_cxo_aon_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_cxo_clk = {
+	.halt_reg = 0x9144,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x9144,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_cxo_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_gx_gmu_clk = {
+	.halt_reg = 0x90bc,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x90bc,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_gx_gmu_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&gpu_cc_gmu_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_hub_aon_clk = {
+	.halt_reg = 0x93e8,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x93e8,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_hub_aon_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&gpu_cc_hub_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_aon_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_hub_cx_int_clk = {
+	.halt_reg = 0x9148,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x9148,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_hub_cx_int_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&gpu_cc_hub_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_aon_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_memnoc_gfx_clk = {
+	.halt_reg = 0x9150,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x9150,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_memnoc_gfx_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_hlos1_vote_gpu_smmu_clk = {
+	.halt_reg = 0x7000,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x7000,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_hlos1_vote_gpu_smmu_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_sleep_clk = {
+	.halt_reg = 0x9134,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x9134,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "gpu_cc_sleep_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct gdsc gpu_cx_gdsc = {
+	.gdscr = 0x9108,
+	.gds_hw_ctrl = 0x953c,
+	.clk_dis_wait_val = 8,
+	.pd = {
+		.name = "gpu_cx_gdsc",
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.flags = VOTABLE | RETAIN_FF_ENABLE,
+};
+
+static struct gdsc gpu_gx_gdsc = {
+	.gdscr = 0x905c,
+	.clamp_io_ctrl = 0x9504,
+	.resets = (unsigned int []){ GPUCC_GPU_CC_GX_BCR,
+				     GPUCC_GPU_CC_ACD_BCR,
+				     GPUCC_GPU_CC_GX_ACD_IROOT_BCR },
+	.reset_count = 3,
+	.pd = {
+		.name = "gpu_gx_gdsc",
+		.power_on = gdsc_gx_do_nothing_enable,
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.flags = CLAMP_IO | AON_RESET | SW_RESET,
+};
+
+static struct clk_regmap *gpu_cc_sar2130p_clocks[] = {
+	[GPU_CC_AHB_CLK] = &gpu_cc_ahb_clk.clkr,
+	[GPU_CC_CRC_AHB_CLK] = &gpu_cc_crc_ahb_clk.clkr,
+	[GPU_CC_CX_FF_CLK] = &gpu_cc_cx_ff_clk.clkr,
+	[GPU_CC_CX_GMU_CLK] = &gpu_cc_cx_gmu_clk.clkr,
+	[GPU_CC_CXO_AON_CLK] = &gpu_cc_cxo_aon_clk.clkr,
+	[GPU_CC_CXO_CLK] = &gpu_cc_cxo_clk.clkr,
+	[GPU_CC_FF_CLK_SRC] = &gpu_cc_ff_clk_src.clkr,
+	[GPU_CC_GMU_CLK_SRC] = &gpu_cc_gmu_clk_src.clkr,
+	[GPU_CC_GX_GMU_CLK] = &gpu_cc_gx_gmu_clk.clkr,
+	[GPU_CC_HLOS1_VOTE_GPU_SMMU_CLK] = &gpu_cc_hlos1_vote_gpu_smmu_clk.clkr,
+	[GPU_CC_HUB_AON_CLK] = &gpu_cc_hub_aon_clk.clkr,
+	[GPU_CC_HUB_CLK_SRC] = &gpu_cc_hub_clk_src.clkr,
+	[GPU_CC_HUB_CX_INT_CLK] = &gpu_cc_hub_cx_int_clk.clkr,
+	[GPU_CC_MEMNOC_GFX_CLK] = &gpu_cc_memnoc_gfx_clk.clkr,
+	[GPU_CC_PLL0] = &gpu_cc_pll0.clkr,
+	[GPU_CC_PLL1] = &gpu_cc_pll1.clkr,
+	[GPU_CC_SLEEP_CLK] = &gpu_cc_sleep_clk.clkr,
+};
+
+static const struct qcom_reset_map gpu_cc_sar2130p_resets[] = {
+	[GPUCC_GPU_CC_ACD_BCR] = { 0x9358 },
+	[GPUCC_GPU_CC_GX_ACD_IROOT_BCR] = { 0x958c },
+	[GPUCC_GPU_CC_GX_BCR] = { 0x9058 },
+};
+
+static struct gdsc *gpu_cc_sar2130p_gdscs[] = {
+	[GPU_CX_GDSC] = &gpu_cx_gdsc,
+	[GPU_GX_GDSC] = &gpu_gx_gdsc,
+};
+
+static const struct regmap_config gpu_cc_sar2130p_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = 0xa000,
+	.fast_io = true,
+};
+
+static const struct qcom_cc_desc gpu_cc_sar2130p_desc = {
+	.config = &gpu_cc_sar2130p_regmap_config,
+	.clks = gpu_cc_sar2130p_clocks,
+	.num_clks = ARRAY_SIZE(gpu_cc_sar2130p_clocks),
+	.resets = gpu_cc_sar2130p_resets,
+	.num_resets = ARRAY_SIZE(gpu_cc_sar2130p_resets),
+	.gdscs = gpu_cc_sar2130p_gdscs,
+	.num_gdscs = ARRAY_SIZE(gpu_cc_sar2130p_gdscs),
+};
+
+static const struct of_device_id gpu_cc_sar2130p_match_table[] = {
+	{ .compatible = "qcom,sar2130p-gpucc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, gpu_cc_sar2130p_match_table);
+
+static int gpu_cc_sar2130p_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct regmap *regmap;
+
+	regmap = qcom_cc_map(pdev, &gpu_cc_sar2130p_desc);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap), "Couldn't map GPU_CC\n");
+
+	clk_lucid_ole_pll_configure(&gpu_cc_pll0, regmap, &gpu_cc_pll0_config);
+	clk_lucid_ole_pll_configure(&gpu_cc_pll1, regmap, &gpu_cc_pll1_config);
+
+	/* Keep some clocks always-on */
+	qcom_branch_set_clk_en(regmap, 0x900c); /* GPU_CC_DEMET_CLK */
+
+	return qcom_cc_really_probe(dev, &gpu_cc_sar2130p_desc, regmap);
+}
+
+static struct platform_driver gpu_cc_sar2130p_driver = {
+	.probe = gpu_cc_sar2130p_probe,
+	.driver = {
+		.name = "gpu_cc-sar2130p",
+		.of_match_table = gpu_cc_sar2130p_match_table,
+	},
+};
+module_platform_driver(gpu_cc_sar2130p_driver);
+
+MODULE_DESCRIPTION("QTI GPU_CC SAR2130P Driver");
+MODULE_LICENSE("GPL");